Torque Converter Lockup - Educate me please
01-18-2013, 09:23 AM
#12
I briefly tried to "add a gauge" and looked thru the many, many options as to what the new gauge was to read/report but didn't see anything related to the transmission, other than fluid temperature. I really didn't have that much time to put towards it last night. There are so many things to view in that app...
Also, I know you can "ask" the ECM to tell you information, if you knew the correct PID numbers but that's why over my head.
Also, I know you can "ask" the ECM to tell you information, if you knew the correct PID numbers but that's why over my head.
01-18-2013, 09:37 AM
#13
TECH Fanatic
Join Date: Jul 2006
Location: K.C.
Posts: 1,737
Likes: 0
Received 0 Likes
on
0 Posts
the pwm style converters will not 100% lock in stock form in the stock tcc calibration. they will slip between 500 and 100 rpms depending on where you are at in the rpm range and load.
01-18-2013, 09:48 AM
#14
Also, because of what you said here, this would mean that when I'm using an online RPM/wheel size/gear ratio calculator, I should add somewhere between 100-500 RPM, because the calculator is a theoretical 100% efficient (meaning no RPM loss) driveline but in reality there is always 100 RPM or more of slip? That felt like rambling, hope it made sense.
01-18-2013, 09:55 AM
#15
TECH Fanatic
Join Date: Jul 2006
Location: K.C.
Posts: 1,737
Likes: 0
Received 0 Likes
on
0 Posts
you don't have to add anything to the tire calculator. not sure what you're trying to achieve with that one actually. has zero to do with speed and directly related to load and rpm. there is always going to be slip in the converter regardless of the tune. it may only be 2-5 rpm, but there is always slip in it.
01-18-2013, 10:36 AM
#16
While in the main screen hit the menu button on your phone.
Select
Settings>
Manage extra PIDs/Sensors>
Hit menu and select add predefined set
Select GM
Scroll down to TCC Slip Speed and click it
Screenshot_2013-01-18-10-46-43.png photo by justasbc | Photobucket
You can hit test, and it will show your RPM's if you are sitting still idling.
Go to the home screen and select realtime information.
Go to an opened screen and hold your finger anywhere to add display.
I selected the digital display
Scroll down to TCC Slip Speed(it should now be highlighted in green indicating you are getting a value)
Select it and drag the gauge to your desired location on your screen
I also added RPM's and vehicle speed so you could see the TCC working.
Here is idling at 0 mph (it will show your RPM's because it is not engagine at all). In my first post I described the Converter as 2 box fans. Think of this on low speed. The first fan is turning, but not moving enough air to move the 2nd fan.
Think of this as the fan in position 2 where it is moving more air, and slipping less.
Think of this as the fan in position 3 where it is moving the max air the fan can move, and it is the closest in speed.
Now it is locked up.
Select
Settings>
Manage extra PIDs/Sensors>
Hit menu and select add predefined set
Select GM
Scroll down to TCC Slip Speed and click it
Screenshot_2013-01-18-10-46-43.png photo by justasbc | Photobucket
You can hit test, and it will show your RPM's if you are sitting still idling.
Go to the home screen and select realtime information.
Go to an opened screen and hold your finger anywhere to add display.
I selected the digital display
Scroll down to TCC Slip Speed(it should now be highlighted in green indicating you are getting a value)
Select it and drag the gauge to your desired location on your screen
I also added RPM's and vehicle speed so you could see the TCC working.
Here is idling at 0 mph (it will show your RPM's because it is not engagine at all). In my first post I described the Converter as 2 box fans. Think of this on low speed. The first fan is turning, but not moving enough air to move the 2nd fan.
Think of this as the fan in position 2 where it is moving more air, and slipping less.
Think of this as the fan in position 3 where it is moving the max air the fan can move, and it is the closest in speed.
Now it is locked up.
Last edited by Gadgetized; 01-18-2013 at 10:52 AM.
01-18-2013, 12:05 PM
#18
While in the main screen hit the menu button on your phone.
Select
Settings>
Manage extra PIDs/Sensors>
Hit menu and select add predefined set
Select GM
Scroll down to TCC Slip Speed and click it
You can hit test, and it will show your RPM's if you are sitting still idling.
Select
Settings>
Manage extra PIDs/Sensors>
Hit menu and select add predefined set
Select GM
Scroll down to TCC Slip Speed and click it
You can hit test, and it will show your RPM's if you are sitting still idling.
01-18-2013, 01:00 PM
#20
you don't have to add anything to the tire calculator. not sure what you're trying to achieve with that one actually. has zero to do with speed and directly related to load and rpm. there is always going to be slip in the converter regardless of the tune. it may only be 2-5 rpm, but there is always slip in it.
The reason I am bringing up this comment is because I am inbetween gear choices (I know, I know I've made a ton of comments all over this board, have my own threads, etc...) and I am thinking that the "theoretical" RPM calculators may be a tad low compared to real world RPM, due to things like engine load, TC slip, etc... If my real world RPM is 100-200 RPM higher than calculated, that affects my decision.